Awesome
Bumblebee Hotword
Bumblebee Hotword is a stripped down and repackaged version of the excellent Porcupine wake word (hotword) system. This requires no cloud services and is freely available to use under the Apache 2.0 license (GPLv3 compatible).
When Bumblebee Hotword is added to a web page, it listens to the microphone and emits an event when it hears any of the available hotwords.
For more information about the Bumblebee platform and its other features visit:
NodeJS Version
If you need hotword detection in NodeJS use bumblebee-hotword-node.
Examples
- Basic Example - most simple example possible
- Full Example - all options available, with visualization
Install
Using npm:
npm install bumblebee-hotword
And include in your web project:
import Bumblebee from "bumblebee-hotword";
Porcupine Web Assembly Codebase
The porcupine webworker files must be manually served from your public html directory and the location must be specified using setWorkersPath()
before starting bumblebee.
bumblebee.setWorkersPath('/bumblebee-workers');
Copy the entire directory here to your web server's public html or assets directory.
Quick Start
const Bumblebee = require('bumblebee-hotword');
let bumblebee = new Bumblebee();
// set path to worker files
bumblebee.setWorkersPath('/bumblebee-workers');
// add hotword
bumblebee.addHotword('bumblebee');
// set sensitivity from 0.0 to 1.0
bumblebee.setSensitivity(0.5);
bumblebee.on('hotword', function(hotword) {
// YOUR CODE HERE
console.log('hotword detected:', hotword);
});
bumblebee.start();
Note: browsers require user-interaction to start the microphone.
Hotwords
The hotwords available by default are:
- alexa
- bumblebee
- computer
- grasshopper
- hey edison
- hey google
- hey siri
- jarvis
- ok google
- porcupine
- terminator
Due to processing time it is recommended to only add the hotwords that need to be used. The hotword spoken can be retreived in the .on('hotword')
event:
bumblebee.addHotword('bumblebee');
bumblebee.addHotword('grasshopper');
bumblebee.addHotword('hey_edison');
bumblebee.addHotword('porcupine');
bumblebee.addHotword('terminator');
bumblebee.on('hotword', function(hotword) {
console.log('hotword detected:', hotword);
});
The Picovoice hotwords open source hotwords are freely usable under the Apache 2.0 license. Custom hotwords can be licensed from https://picovoice.ai.
Adding a Custom Hotword
Like the open source hotwords, the file must be in Porcupine's "_wasm.ppn" format.
You can use the tools/convert_ppn.sh shell script (uses the xdd command line program) to convert the PPN file to a JavaScript file:
sh tools/convert_ppn.sh my_custom_hotword_wasm.ppn
The resulting .js file can then be added to Bumblebee:
import my_custom_hotword from './my_custom_hotword'
bumblebee.addHotword('my_custom_hotword', my_custom_hotword, 0.5)
Sensitivity
Hotword detection sensitivity (0.0 to 1.0) is configurable only before the first call to bumblebee.start()
bumblebee.setSensitivity(0.8);
Disable Bumblebee
Use the stop() method to disable the microphone and all processing:
bumblebee.stop();
Mute
bumblebee.setMuted(true); // mutes microphone volume
Set Microphone Volume
bumblebee.setMicVolume(0.5); // sets microphone volume to 50%
bumblebee.setMicVolume(2); // sets microphone volume to 200%
Spectrum Analyzer
Bumblebee Hotword instantiates an audio analyser which can be used to draw an oscilloscope or other types of processing:
bumblebee.on('analyser', function(analyser) {
// analyser is an instance of audioContext.createAnalyser()
});
Audio Data
Bumblebee Hotword emits a stream of "data" events which can be used to receive the microphone audio data after downsampling to 16bit/16khz PCM. This is the format also used by other speech processing systems such as DeepSpeech.
bumblebee.on('data', function(data) {
console.log('data', data);
});
Run Examples Locally
Clone this repo, then...
For the basic example:
cd examples/basic-example
yarn install
yarn start
For the full example:
cd examples/full-example
yarn install
yarn start
License
This repository is licensed under Apache 2.0. See Porcupine for more details.
Change Log
0.2.1:
- add "ok google" hotword
0.2.0:
- upgrade to Porcupine v1.9
- added new Porcupine hotwords: computer, alexa, hey google, hey siri, jarvis
0.1.0:
- add microphone selection